We present a unified formalism about spatial and angular Goos-Hänchen (GH) and Imbert-Fedorov (IF) shifts. When a horizontally polarized Gaussian beam is reflected from guided-wave resonance structure, the photonic spin Hall effect (PSHE) caused by both spatial and angular IF shifts is theoretically investigated with consideration of beam propagation. When PSHE is observed at Rayleigh range of the reflected beam, the maximum total IF shift is larger than the maximum spatial IF shift. Meanwhile, total IF shift varies faster with the incident angle than the spatial IF shift. The formalism also shows that the spatial and angular IF shifts increase with the increase of the width of the resonant absorption dip. Theoretical predictions agree well with numerical calculations. Those results provide a new way to improve PSHE and have potential application of improving the accuracy of sensors based on PSHE of this structure.

我们提出了关于空间和角度Goos-Hänchen（GH）和Imbert-Fedorov（IF）位移的统一形式主义。当水平偏振高斯光束从导波共振结构反射时，理论上考虑了光束传播，研究了由空间和角度IF位移引起的光子自旋霍尔效应（PSHE）。当在反射光束的瑞利范围内观察到PSHE时，最大总IF偏移大于最大空间IF偏移。同时，总IF偏移随入射角的变化快于空间IF偏移。形式主义还表明，空间和角度中频偏移随共振吸收谷的宽度增加而增加。理论预测与数值计算非常吻合。